Autospectra of observed particle motions in ocean waves are presented. The spectra show the dominant peaks associated with the frequencies of the visually observed waves. Examination of the autospectra relative to depth reveals a strong attenuation of spectral energy, particularly at the higher frequencies; the peaks associated with the waves tend to redden the deeper the wave motions are observed....
Shonting, David H.. 1968. "Autospectra of observed particle motions in wind waves." Journal of Marine Research 26, (1). https://elischolar.library.yale.edu/journal_of_marine_research/1113